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Message from discussion Boonen uses great big fat tubular tire in Paris-Roubaix
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thirty-six  
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 More options Apr 12 2012, 4:44 pm
Newsgroups: rec.bicycles.tech
From: thirty-six <thirty-...@live.co.uk>
Date: Thu, 12 Apr 2012 13:44:17 -0700 (PDT)
Local: Thurs, Apr 12 2012 4:44 pm
Subject: Re: Boonen uses great big fat tubular tire in Paris-Roubaix
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On Apr 12, 8:17 pm, Chalo <chalo.col...@gmail.com> wrote:

> dustoyevsky wrote:

> > Chalo wrote:

> > > James wrote:

> > > > Frank Krygowski wrote:

> > > > > I can appreciate that there's a limit to how much tire width and
> > > > > clearance is needed for most racing. What I don't understand is the
> > > > > advantage of providing only very narrow clearance for only narrow tires.
> > > > > Why not give more, just to add to a bike's versatility?

> > > > Which is why I specified that my custom steel frame is to accommodate up
> > > > to 28mm tyres ;-)

> > > Fatties fit fine on sane bikes.

> > >http://lovelybike.blogspot.com/2011/04/surly-cross-check-worthy-host-...

> > "Sane for what?" (yes, I bit. Got an answer?)

> Short answer:  Everything, just about.  Club ride one day, cyclocross
> the next, commute to work, overnight tour, and then hit the
> singletrack.

> When I work on race type bikes from Merckx's day, I note that most of
> them can take 32 or even 35mm tires.  And why not?  It not only makes
> them more versatile, but the extra clearance makes them more
> serviceable and fault tolerant with skinny tires too.

> Chalo

Traditionally centre-pull brakes were the weekend racer's choice as he
could swap between 27x1.1/4 tyres through the week to his sprints of
the weekend and adjust the block position..  With amateurs taking the
pro's lead with sidepull brakes it became necessary for all riders to
be on a similar standing as regards braking capacity during racing.
The arms got shorter as riders wanted more from their brakes and the
1.1/4" tyre will fit no more.  Now that the dual pivot is common on
racing (and styled) bikes there could be a return to the swapping of
wheels according to the function of the day, rather than having to buy
another bike for rough stuff.

I remember that Campag offered a dropped pivot for their sidepulls but
it was rarely seen on the road by the time I was intrested in the
sport.  I'm wondering if that was intended for weekend swapping as
well as converting old frames for race only use.   It seems the
obvious choice to allow a clubman's frame to be used for road racing
or remove and put big tyres on for grass-track racing.  I think it
follows with the introduction of the six-speed block which then made a
road frame not quite so suitable for track riding.

As regards to choosing a frame today, I'll recommend that any newcomer
to the sport gets a frame with as much clearance as possible and fit
the long reach dual pivot callipers.  It means they also have
something suitable for grass-tracking, touring, daily transport, cyclo-
cross and cyclo-polo as well as criterium racing.  Don't forget the
mudguard eyes.


 
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